diff --git a/src/commands/update.ts b/src/commands/update.ts
index 377f97bd..e7ae1d6a 100644
--- a/src/commands/update.ts
+++ b/src/commands/update.ts
@@ -62,7 +62,7 @@ export default class UpdateCommand extends Command {
     const {version, channel} = manifest
     cli.action.start(`${this.config.name}: Updating CLI from ${color.green(this.config.version)} to ${color.green(version)}${channel === 'stable' ? '' : ' (' + color.yellow(channel) + ')'}`)
     const http: typeof HTTP = require('http-call').HTTP
-    const filesize = require('filesize')
+    const filesize = require('filesize').partial({unix: true})
     const output = path.join(this.clientRoot, version)
 
     const {response: stream} = await http.stream(manifest.gz)
diff --git a/src/tar.ts b/src/tar.ts
index 7a7f6f6c..84b7c804 100644
--- a/src/tar.ts
+++ b/src/tar.ts
@@ -8,7 +8,7 @@ const debug = require('debug')('oclif-update')
 export async function extract(stream: NodeJS.ReadableStream, basename: string, output: string, sha?: string) {
   const getTmp = () => `${output}.partial.${Math.random().toString().split('.')[1].slice(0, 5)}`
   let tmp = getTmp()
-  if (await fs.pathExists(tmp)) tmp = getTmp()
+  if (fs.pathExistsSync(tmp)) tmp = getTmp()
   debug(`extracting to ${tmp}`)
   try {
     await new Promise((resolve, reject) => {